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7 May, 14:10

The sum of seven angles of an octagon is 132 degrees each. Find the measure of the eighth angle.

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  1. 7 May, 14:19
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    the sum of the angles in an ngon (a polygon with n sides) is (n-2) * 180

    so an octagon has 8 sides and has a sum total of (8-2) * 180=1080 degrees

    if each of 7 angles is 132, then 1080=?+7*132

    1080=?+924

    156=?

    the 8th angle is 156 degrees
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